Water Supply Engineering
To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36,00,000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 √Q, the water horse power of the pump is

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Water Supply Engineering
In centrifugal pump installation,

All listed here
The motor may burn out if it is started with empty delivery pipe and with open gate valve
Pump is properly primed before starting
The diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe

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